Answer: this relationship would be mutualism
Explanation: it is a relationship where both species benefit
Single Replacement and Double Replacement reactions
Before an article is published in a scientific journal or in any "peer-reviewed" journal the article is reviewed thoroughly by scholars from the journal as well as peers or scholars of the articles author from the same field. This process occurs to provide credibility to the ideas being published and so that readers and other scholars can rely on the validity of the material being published.
D) Chlorine, Cl. Hope that helped